Anyone who chants this narration or even thinks of this narration about the activities of Mahārāja Ambarīṣa certainly becomes a pure devotee of the Lord.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
इत्येतत्पुण्यमाख्यानमम्बरीषस्य भूपतेः । सङ्कीर्तयन्ननुध्यायन् भक्तो भगवतो भवेत्
ityetatpuṇyamākhyānamambarīṣasya bhūpateḥ | saṅkīrtayannanudhyāyan bhakto bhagavato bhavet
SB 9.5.27